Unique strings

Count the exact number of unique tokens as fast as possible.

Input

One token per line on STDIN:

JWXcKKaWzvFL5
Rof
3ztCpA
5wHcGN
*UiEMthaTS*g

Output

Print the exact count of unique tokens to STDOUT.

Constraints

Character set: 0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ@#%*
Maximum token length: 16
Approximately 1,000,000 unique tokens

Restrictions:20s512Mb 1 Score Packages

Feel free to create an issue if you need an extra library from the standard Ubuntu repository.

Name	Version	Description
libc6-dev	2.39-0ubuntu8.7	GNU C Library: Development Libraries and Header Files Contains the symlinks, headers, and object files needed to compile and link programs which use the standard C library.
libclang-common-14-dev	1:14.0.6-19build4	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-15-dev	1:15.0.7-14build3	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-16-dev	1:16.0.6-23ubuntu4	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-17-dev	1:17.0.6-9ubuntu1	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-18-dev	1:18.1.3-1ubuntu1	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-19-dev	1:19.1.1-1ubuntu1~24.04.2	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-20-dev	1:20.1.2-0ubuntu1~24.04.2	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libcrypt-dev	1:4.4.36-4build1	libcrypt development files This package contains the files needed for developing applications that use libcrypt.
libgcc-10-dev	10.5.0-4ubuntu2.1	GCC support library (development files) This package contains the headers and static library files necessary for building C programs which use libgcc, libgomp, libquadmath, libssp or libitm.
libgcc-11-dev	11.5.0-1ubuntu1~24.04.1	GCC support library (development files) This package contains the headers and static library files necessary for building C programs which use libgcc, libgomp, libquadmath, libssp or libitm.
libgcc-12-dev	12.4.0-2ubuntu1~24.04.1	GCC support library (development files) This package contains the headers and static library files necessary for building C programs which use libgcc, libgomp, libquadmath, libssp or libitm.
libgcc-13-dev	13.3.0-6ubuntu2~24.04.1	GCC support library (development files) This package contains the headers and static library files necessary for building C programs which use libgcc, libgomp, libquadmath, libssp or libitm.
libgcc-14-dev	14.2.0-4ubuntu2~24.04.1	GCC support library (development files) This package contains the headers and static library files necessary for building C programs which use libgcc, libgomp, libquadmath, libssp or libitm.
libobjc-13-dev	13.3.0-6ubuntu2~24.04.1	Runtime library for GNU Objective-C applications (development files) This package contains the headers and static library files needed to build GNU ObjC applications.
libssl-dev	3.0.13-0ubuntu3.9	Secure Sockets Layer toolkit - development files This package is part of the OpenSSL project's implementation of the SSL and TLS cryptographic protocols for secure communication over the Internet. . It contains development libraries, header files, and manpages for libssl and libcrypto.
libstdc++-10-dev	10.5.0-4ubuntu2.1	GNU Standard C++ Library v3 (development files) This package contains the headers and static library files necessary for building C++ programs which use libstdc++. . libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which was included up to g++-2.95. The first version of libstdc++-v3 appeared in g++-3.0.
libstdc++-11-dev	11.5.0-1ubuntu1~24.04.1	GNU Standard C++ Library v3 (development files) This package contains the headers and static library files necessary for building C++ programs which use libstdc++. . libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which was included up to g++-2.95. The first version of libstdc++-v3 appeared in g++-3.0.
libstdc++-12-dev	12.4.0-2ubuntu1~24.04.1	GNU Standard C++ Library v3 (development files) This package contains the headers and static library files necessary for building C++ programs which use libstdc++. . libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which was included up to g++-2.95. The first version of libstdc++-v3 appeared in g++-3.0.
libstdc++-13-dev	13.3.0-6ubuntu2~24.04.1	GNU Standard C++ Library v3 (development files) This package contains the headers and static library files necessary for building C++ programs which use libstdc++. . libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which was included up to g++-2.95. The first version of libstdc++-v3 appeared in g++-3.0.
libstdc++-14-dev	14.2.0-4ubuntu2~24.04.1	GNU Standard C++ Library v3 (development files) This package contains the headers and static library files necessary for building C++ programs which use libstdc++. . libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which was included up to g++-2.95. The first version of libstdc++-v3 appeared in g++-3.0.
libtbb-dev	2021.11.0-2ubuntu2	parallelism library for C++ - development files TBB is a library that helps you leverage multi-core processor performance without having to be a threading expert. It represents a higher-level, task-based parallelism that abstracts platform details and threading mechanism for performance and scalability. . (Note: if you are a user of the i386 architecture, i.e., 32-bit Intel or compatible hardware, this package only supports Pentium4-compatible and higher processors.) . This package includes the TBB development files.

Back to listJan 14, 2026 20:11

Josu San MartinScore: 4,312Success

Source Code

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Challenge History

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Jan 14, 2026 20:12	4,298	165,711,340	138,848,000	2,996,000	2,404,352
2	Jan 14, 2026 20:14	4,300	167,905,912	139,904,000	1,998,000	2,510,848
3	Jan 14, 2026 20:14	4,300	165,536,969	139,897,000	1,998,000	2,289,664
4	Jan 14, 2026 20:15	4,300	169,189,303	140,909,000	999,000	2,400,256
5	Jan 14, 2026 20:12	4,301	172,293,023	138,945,000	2,998,000	2,289,664
6	Jan 14, 2026 20:14	4,304	162,817,747	141,035,000	1,000,000	2,289,664
7	Jan 14, 2026 20:15	4,305	166,834,008	141,066,000	1,000,000	2,400,256
8	Jan 14, 2026 20:14	4,305	163,617,415	140,076,000	2,001,000	2,289,664
9	Jan 14, 2026 20:15	4,305	164,373,056	140,065,000	2,000,000	2,396,160
10	Jan 14, 2026 20:12	4,306	165,410,892	141,086,000	1,000,000	2,510,848
11	Jan 14, 2026 20:14	4,306	168,537,854	141,091,000	1,000,000	2,293,760
12	Jan 14, 2026 20:15	4,306	165,203,180	140,081,000	2,001,000	2,400,256
13	Jan 14, 2026 20:32	4,307	167,481,919	140,127,000	2,001,000	2,289,664
14	Jan 14, 2026 20:12	4,307	162,964,491	138,132,000	4,003,000	2,404,352
15	Jan 14, 2026 20:33	4,307	169,505,156	141,134,000	1,000,000	2,289,664
16	Jan 14, 2026 20:32	4,308	163,521,806	140,166,000	2,002,000	2,289,664
17	Jan 14, 2026 20:14	4,308	167,082,140	140,159,000	2,002,000	2,289,664
18	Jan 14, 2026 20:14	4,308	167,891,957	141,162,000	1,001,000	2,396,160
19	Jan 14, 2026 20:12	4,309	163,021,920	142,209,000	0	2,289,664
20	Jan 14, 2026 20:14	4,309	170,955,061	142,190,000	0	2,289,664
21	Jan 14, 2026 20:32	4,311	170,716,496	141,250,000	1,001,000	2,289,664
22	Jan 14, 2026 20:33	4,312	165,174,998	140,299,000	2,004,000	2,289,664
23	Jan 14, 2026 20:12	4,312	173,200,385	140,277,000	2,003,000	2,289,664
24	Jan 14, 2026 20:15	4,313	164,575,527	141,317,000	1,002,000	2,387,968
25	Jan 14, 2026 20:12	4,313	169,638,901	141,350,000	995,000	2,289,664
26	Jan 14, 2026 20:12	4,313	162,906,846	141,318,000	1,002,000	2,506,752
27	Jan 14, 2026 20:33	4,316	170,374,628	141,440,000	1,003,000	2,289,664
28	Jan 14, 2026 20:15	4,317	169,374,866	138,471,000	3,984,000	2,396,160
29	Jan 14, 2026 20:12	4,319	168,896,138	141,521,000	1,003,000	2,289,664
30	Jan 14, 2026 20:14	4,320	166,868,135	139,580,000	2,991,000	2,289,664
31	Jan 14, 2026 20:33	4,474	177,088,575	146,630,000	997,000	2,396,160
32	Jan 14, 2026 20:33	4,476	173,595,415	146,709,000	998,000	2,289,664
33	Jan 14, 2026 20:33	4,476	175,938,950	146,703,000	997,000	2,289,664
34	Jan 14, 2026 20:33	4,480	170,864,530	144,834,000	2,996,000	2,289,664
35	Jan 14, 2026 20:33	4,480	169,194,379	145,837,000	1,997,000	2,289,664
36	Jan 14, 2026 20:33	4,484	170,586,340	146,961,000	999,000	2,396,160
37	Jan 14, 2026 20:33	4,486	175,461,007	147,029,000	1,000,000	2,510,848
38	Jan 14, 2026 20:33	4,489	172,540,134	145,133,000	3,002,000	2,289,664
39	Jan 14, 2026 20:33	4,530	176,655,924	148,490,000	996,000	2,404,352
40	Jan 14, 2026 20:11	9,992	359,297,110	327,734,000	1,998,000	2,289,664
41	Jan 14, 2026 20:11	9,994	353,012,312	326,818,000	2,998,000	2,265,088
42	Jan 14, 2026 20:11	10,022	359,904,483	329,715,000	999,000	2,289,664

Model	Intel(R) Xeon(R) CPU E3-1271 v3 @ 3.60GHz
Cores	1